if you forget to renew your certificate your cron job may stop working so you may want to use this syntax instead

Useful bashrc aliases edit your ~/.bashrc file by using VI vi ~/.bashrc alias l=”ls -la” alias st=’svn st’ alias di=’svn di’ alias di=’svn diff –diff-cmd diff -x -uw’ # ignore whitespaces alias ci=’svn ci’ alias up=”svn up” alias rs=”rsync –verbose –stats –recursive –times –perms –links –delete –exclude ‘*bak’ –exclude ‘*~’  –exclude ‘._*’ $1 $2″ EDITOR=vi […]

Port 3389 is used by Remote Desktop Connection Client

How to download a site using wget Download the file in background. Will download all the links from the list.txt file and pretending that it’s Firefox. wget –continue –verbose –input-file=”list.txt” –output-file=”list.log” –user-agent=”Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1″ If you want to ignore the SSL expiration or validity you can pass –no-check-certificate parameter.

VirtualBox command line usage Related http://www.ubuntugeek.com/how-to-control-virtual-machines-virtualbox-using-vboxmanage.html

Create a tar file and verify the tar archive Related http://www.cyberciti.biz/faq/unix-verify-tape-backup/

Summarize disk usage of each FILE, recursively for directories.

dmidecode  is a tool for dumping a computers DMI (some say SMBIOS) ta ble contents in a human-readable format. This table contains a descrip tion  of  the  systems  hardware  components,  as well as other useful pieces of information such as serial numbers and BIOS revision.  Thanks to  this  table,  you  can  retrieve this information without […]

dpkg-reconfigure reconfigures packages after they have already been installed. Pass it the names of a package or packages to reconfigure. It will ask configuration questions, much like when the package was first installed. Example:

Examples lshw is a small tool to extract detailed information  on  the  hardware configuration of the machine. It can report exact memory configuration, firmware version, mainboard configuration, CPU version and speed, cache configuration,  bus speed, etc. on DMI-capable x86 or IA-64 systems and on some PowerPC machines (PowerMac G4 is known to work). It currently […]